There's a bit of interesting work that's done re: introducing cloned organisms from decades past (from a time when biodiversity wasn't as strained), e.g. https:

There's a bit of interesting work that's done re: introducing cloned organisms from decades past (from a time when biodiversity wasn't as strained), e.g. https://www.fws.gov/press-release/2024-11/advancements-black-footed-ferret-conservation-continue-new-offspring-cloned https://www.fws.gov/press-release/2024-11/advancements-black... One could also imagine releasing a virus which reprogrammed wildlife genomes for resistance against some toxin that we had previously introduced into the environment (ideally we would also stop introducing the toxin...). But none of these things come down to "heres a tool for you to use". Golly I wish I could come up with some technology that would help the woodpeckers better hunt invasive pine beetles--the forests around me are looking pretty rough--but that's a bit too fantastical to hope for.